Nut lock



Oct. 11, 1938. J. A. WILSON 2,132,667

' NUT LOCK Filed May 21. 1957 I N VEN TOR B a/mmUJVm ATTORNEY PatentedOct. 11, 1938 I UNITED STATES PATENT OFFICE I NUT LOCK James A. Wilson,San Francisco, Calif. Application May 21, 1937, Serial No. 143,989

1 mm. (Cl. 151-1 This invention relates to improvements in nutof whichare formed a series of annularly arlocks, and more particularly to thekind of a nutranged depressions I on the outside of each of lock havingreversely threaded bolt nuts and lockwhich is provided a circular raisedmember 8. ing means for preventing the displacement of On the extension3 is screwed an outer left hand 5 nuts with respect to one another andto the bolt threaded nut 9 on the inner face of which are 5 on whichthey are screwed. formed a series of annularly arranged depressions Theprimary object of my invention is to pro- I 0 on the outside of each ofwhich is provided a vide an improved nut-lock wherein the nuts circularraised member ll. When the nut 9 is screwed on the bolt maybesecurelylocked against screwed inwardly the raised members 8 and ll displacementby novel means interposed between are brought into frictional engagementwith the 10 and engaging the nuts. adjacent faces of the nuts 6 and 9respectively,

Another object of my invention is to provide a or with one another. Thefrictional engagement nut-lock which will effectively lock the nutscarof the raised members 8 and II with the opp n ried by a bolt so a toprevent their becoming faces of the nuts 6 and 9 respectively, or withone 18 accidentally unscrewed and lost when they are another. Thefrictional engagement of the 5 subjected to a series of jolting orjarring shocks raised members 8 and H w t he opp s faces or vibrations.of the nuts 6 and 9 respectively, or with each other and further objectsof my invention will other, tends to normally prevent the relative disbepointed out hereinafter, indicated in the applacement of the said nutswith respect to one 20 pended claims or will be obvious to one skilledin 8 61. S as o positively p t the s- 20 the art upon an understandingof the present displacement of the nuts by reason of the abnorclosure.For the purposes of this application I: ma] vibration or jarring of thedevice on which have elected to show herein certain forms and. the boltl and nuts are m unted. I pr r details of a nut-lock representative ofmy inveninterpO ayer of liquid c adhesive 5 tion; it is to beunderstood, however, that the emsolder between the said nuts before theyare bodiment of my invention herein shown and det e ed and b u to W enhe nut 9 scribed is for the purpose of illustration only, and is screwedtoward and into close proximity to the t t e e o e it is not to beregarded as e::- nut 6, the cement I2 is forced into and fills thehaustive of the variations of the invention, nor is depressions I and I0and surrounds the raised 0 it to be given an interpretation such asmight members 8 and H. After the cement l2 hardens have the effect oflimiting the claim, short of t forms a rigid member body which firmlythe true and" most comprehensive scope of the binds the nuts 6 and 9into a unitary structure invention in the art. which is normallymaintained in a fixed position In the accompanying drawing; with respectto the bolt. The nuts 9' and 6 are Fig. 1 is an enlarged side elevationof a bolt both prevented from becoming unscrewed or 5 provided with myimproved nut-lock invention, loosened irrespective of the agitation towhich the the latter being shown in section; and device may besubjected.

F 5 an enlarged Sectional View taken 011 Having described my inventionwhat I claim is: the line 2-2 of Fig. 1. t A nut-lock comprising a boltwith an end hav- 40 Referring to the drawing the numeral I desiging twoadjacentv threaded portions of different 40 nates a bolt having a head 2at one end and a rediameters, the outer portion being of less diamdilcedextension 3 at s pposite end. That end eter and provided'with threads ofless pitch than of the bolt positioned adjacent the extension 8 is thoseof the other threaded portion, and a pair provided with a series ofright hand threads 4 of nuts adapted respectively to be screwed ontowhile the extension t e s ovided with a le said two threaded portionsand having their ad- 45 hand series of threads 5. The threads 5 are ofjacent faces each provided with a series of spaced less pitch than thethreads 4, preferably of a ratio and annularly arranged depressions, anda series of one to 2, thereby permitting the opposing faces of annularlyarranged ring-shaped raised memof the nuts to be positioned insubstantially bers extending around the depressions 01 both P el planes.nuts, and the said depressions and raised memso screwed 011 to the rightd threaded Por ion bers of one nut being positioned directly opposite ofthe bolt l and ordinarily in engagement with the depressions and raisedmembers of the other an object to which the bolt is applied, is aninnut. I ner right hand threaded nut 8, in the outer face JAMES A.WILSON.

